Toothbrush



FIG. 1 is a perspective view of a toothbrush, showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is an end elevational view thereof;

FIG. 6 is an elevational view of the opposite end thereof. 

The ornamental design for a toothbrush, as shown. 